31220003423 has 24 divisors (see below), whose sum is σ = 36544519440. Its totient is φ = 26592935040.

The previous prime is 31220003371. The next prime is 31220003429. The reversal of 31220003423 is 32430002213.

It is not a de Polignac number, because 31220003423 - 2¹⁴ = 31219987039 is a prime.

It is a super-2 number, since 2×31220003423² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31220003395 and 31220003404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31220003429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6516713 + ... + 6521501.

It is an arithmetic number, because the mean of its divisors is an integer number (1522688310).

Almost surely, 2^31220003423 is an apocalyptic number.

31220003423 is a deficient number, since it is larger than the sum of its proper divisors (5324516017).

31220003423 is a wasteful number, since it uses less digits than its factorization.

31220003423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5607 (or 5600 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 31220003423 its reverse (32430002213), we get a palindrome (63650005636).

The spelling of 31220003423 in words is "thirty-one billion, two hundred twenty million, three thousand, four hundred twenty-three".